You can. The only difference between the DSi XL and the DS lite are that the DSi XL has the camera and it has a larger screen.
Play gba games and ds games u can connect to other ds's with out a wire and it got a touch screen
On most games it doesnt, but on some games it will
Yes, the NDS lite can play all DS games
No. But, you will be able to play ds lite games ont the 3DS.
Yes you can play Nintendo DS games on a Nintendo ds lite.
Yes, i saw it on youtube:http://www.youtube.com/watch?v=x23aJsEmSig&feature=related
Yes, you can play DS lite games on the DSi as well as the DSi XL
It can play GameBoy games and DS games.
No. There is no way to download or play DSiWare games on Nintendo DS or DS Lite systems.
Yes, DS games are region free.
Yes, they can play the dsi games.